Several MPEG 1 on one DVD-R

[MI6]

I used to put 6 films on one DVD disc (4,7 Gb) in MPEG1 (352x288) but when I play DVD always on some films (not at all) audio is running before video (about 2-3 seconds). I use "WINCOPY DVD Standard" to rip original DVD movies in MPEG 1 format, I collect 6 films (each one is about 700 Mb), then I use TMPGEnc DVD Author 1.6 to create VOB files and authoring a DVD file. Every single movie I authoring as a single file in main meny but when I play some film from the meny, audio and video file are not synchronizied. I play each of these MPEG 1 file before DVD authoring them but there video and audio is running OK. Note that every single MPEG1 file is 352x288, 25fps, PAL with MP2 audio. I've tried 5-6 times with more then 20 DVD discs (ripping them) but always the same problem. Does anybody has some good advice?
REGARDS, MI6.

[Baldrick]

have you tried convert to mpeg1 with some other tool? like dvdx